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    <head><title>What is SSH?</title>
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        <h1>
            <MadCap:keyword term="SSH" />What is SSH?</h1>
        <p>SSH (Secure Shell) is a security application that allows you to make 
 a secure connection to a server that has the SSH protocol installed. Whereas 
 FTP servers usually 'listen' on port 21 for connection, SSH servers use 
 port 22.&#160;</p>
        <p>For maximum security, Ipswitch WS_FTP Pro utilizes SSH2 with the SFTP 
 protocol to make SSH transfers.</p>
        <p><span style="font-weight: bold;">Note: </span>SSH can be used with a 
 variety of authentication methods. However, WS_FTP 
 only supports simple password authentication and public key authentication.&#160;</p>
        <p>&#160;</p>
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            <MadCap:relatedTopics class="relatedTopics_1">
                <MadCap:relatedTopic src="Exporting_an_SSH_Key.htm" />
                <MadCap:relatedTopic src="Generating_an_SSH_Key_Pair.htm" />
                <MadCap:relatedTopic src="How_to_make_an_SSH_connection.htm" />
                <MadCap:relatedTopic src="SSH_Trusted_Hosts.htm" />
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